Image for a portion of a display screen



The FIGURE is a front view of an image for a portion of a display screen showing the new design.

The broken line showing of a region and the unshaded area there within forms no part of the claimed design. The broken line showing of the display screen is for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for an image for a portion of a display screen, as shown and described. 